Changed fileupload library from org.apache.tomcat.util.http.fileupload to org.apache.commons.fileupload
because of a NoSuchMethodError on ServletFileUpload.parseRequest(...) on the Tomcat Server on the ETH machine.
- worked again on applications
  . few bug fixes
  . added app secret
  . added possibility to upload data to user without the need of the user being logged in via secret and appID and a auth token
  . added Token servlet for authentication process
- added first draft of developer guide to document my work there. Used syntaxHighlighter to do so
- redesigned the navigation on the left and the action bar at the top right of the GUI to be loaded from external files. makes it easier to change these things on all pages simultaneously
- redesigned user icon and application icon adding. now we store the id rather then the image name, which was not unique. The more on the server side image queries are now finally protected and only accessible if logged in.
- other bug fixes along the way
- Implemented File upload for records
- For file upload added a new servlet that allows to query the files
- Fixed some bugs on the message pages regarding messages sent to and from institutes
- Updated developer guide for the file and image REST API